An improved image encryption algorithm based on double random phase encoding and chaos

被引：1
|
作者：
机构：
[1] College of Science, Nanjing University of Posts and Telecommunications, Nanjing
[2] Key Lab of Broadband Wireless Communication and Sensor Network Technology of Ministry of Education, Nanjing University of Posts and Telecommunications, Nanjing
来源：
Zhu, W. (zhuwei@njupt.edu.cn) | 1600年 / Chinese Optical Society卷 / 34期
关键词：
Chaos; Fourier optics; Fresnel diffraction; Image encryption; Random phase encoding;
D O I：
10.3788/AOS201434.0607001
中图分类号：
学科分类号：
摘要：
Aiming at the safety of double random phase encoding system in the Fresnel domain, an improved encryption algorithm is proposed. By means of the phase encoding in advance, the new system overcome the flaws of insensitivity to the first random phase mask and the first diffraction distance in original system. After the double random phase encoding module, the secondary encryption based on the amplitude-phase substitution of complex value image makes the pixel value distribution of encrypted image is more uniform. Random masks in the proposed algorithm are generated from three different chaotic systems. With the dynamics of chaotic systems, such as nonlinearity and sensitivity to initial values, the key volume is reduced, the key space is enlarged and complexity of the system is increased. Simulation is conducted on statistical analysis, correlation analysis and key sensitivity test. The experimental results show that the improved algorithm has higher security.
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  • [1] Refregier P., Javidi B., Optical image encryption based on input plane and Fourier plane random encoding, Opt Lett, 20, 7, pp. 767-769, (1995)
  • [2] Situ G., Zhang J., Double random-phase encoding in the Fresnel domain, Opt Lett, 29, 14, pp. 1584-1586, (2004)
  • [3] Peng X., Cui Z.Y., Tan T.N., Information encryption with virtual-optics imaging system, Opt Commun, 212, 4, pp. 235-245, (2002)
  • [4] Unnikrishnan G., Joseph J., Singh K., Optical encryption by double-random phase encoding in the fractional Fourier domain, Opt Lett, 25, 12, pp. 887-889, (2000)
  • [5] Peng X., Wei H., Zhang P., Optical Information Security Introduction, pp. 181-219, (2008)
  • [6] Xi S., Sun X., Liu B., Et al., New image encryption technology of image based on computer generated hologram, Laser & Optoelectronics Progress, 49, 4, (2012)
  • [7] Kong D., Shen X., Lin C., Et al., Multi-image encryption based on wavelet transform and fractional Fourier transform, Laser & Optoelectronics Progress, 50, 9, (2013)
  • [8] He M., Tan Q., Cao L., Et al., Security enhanced optical encryption system by random phase key and permutation key, Opt Express, 17, 25, pp. 22462-22473, (2009)
  • [9] Chen W., Chen X.D., Space-based optical image encryption, Opt Express, 18, 26, pp. 27095-27104, (2010)
  • [10] Wan Q., Xiang P., Asymmetric cryptosystem based on phase-truncated Fourier transforms, Opt Lett, 35, 2, pp. 118-120, (2010)
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